Mark each shelf with labels that denote the contents of each area of the shelf (i.e. canned goods, baking ingredients, etc.)
As you organize, take note of items you may need to buy or replace. Make a shopping list for these items and be sure to leave room for them on the shelves.
Small items like soup mixes and bouillon cubes can be kept together in plastic containers. Non-food items can be stored on the floor or lower shelves (i.e. paper products).
Store it carefully
Soda bottles and other heavy items can also be stored on the floor or on low shelves.
Consider mounting wall hooks or a pegboard to hang items like kitchen cloths and cleaning equipment.
Basket it up
Roll-out rattan baskets are an excellent way to keep your fruits and vegetables stored.